Confucius. Book 2, Chapter 22.
Book 2, Wei Chang
The Master said, "I do not know how a man without truthfulness is to get on. How can a large carriage be made to go without the cross-bar for yoking the oxen to, or a small carriage without the arrangement for yoking the houses?"
Text source: Lun Yu, The Confucian Analects. Translated by James Legge.